Cited by 163Cell death mechanisms and regulationPARP inhibition in cancer therapyHeavy Metal Exposure and Toxicity

The Role of NADPH Oxidase and Neuronal Nitric Oxide Synthase in Zinc-Induced Poly(ADP-ribose) Polymerase Activation and Cell Death in Cortical Culture

Kim, Yang-Hee, Koh, Jae-Young·2002·Experimental Neurology

Abstract

In the present study, we examined the role and the mechanism of poly(ADP-ribose) polymerase (PARP) and poly(ADP-ribose) glycohydrolase (PARG) activation in zinc-induced cell death in cortical culture. After brief exposure to 400 microM zinc, cortical cells exhibited DNA fragmentation, increased poly(ADP-ribosyl)ation, and decreased levels of nicotinamide adenine dinucleotide (NAD) and ATP and subsequently underwent cell death. Inhibitors of PARP/PARG attenuated both zinc-induced NAD/ATP depletion and cell death, thereby implicating the PARP/PARG cascade in these processes. The zinc-inducible enzymes NADPH oxidase and neuronal nitric oxide synthase (nNOS) contributed to PARP activation as their inhibitors attenuated zinc-induced poly(ADP-ribosyl)ation. Levels of nitric oxide and nitrites increased following zinc exposure, consistent with NOS activation. In addition, Western blots and RT-PCR analysis revealed that protein and mRNA levels of nNOS specifically increased following zinc exposure in a manner similar to that of NADPH oxidase. The present study demonstrates that induction of NADPH oxidase and nNOS actively contributes to PARP/PARG-mediated NAD/ATP depletion and cell death induced by zinc in cortical culture.

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Crossref · 10.1006/exnr.2002.7990

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  • Zinc influx into neurons leads to nitric oxide generation, PARP-1 activation, and cell death.

    “Like Ca 2+ influx, zinc influx into neurons leads to the generation of nitric oxide and subsequent activation of PARP-1 and cell death [114].”

    From Parvalbumin interneuron vulnerability and brain disorders (2021) · cites this paper as [114]

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Authors
Kim, Y.-H., & Koh, J.-Y.
Affiliations
  • Sejong University (KR)
  • University of Ulsan (KR)
Corresponding author
Koh, Jae-Young
Venue
Experimental Neurology
Publisher
Elsevier BV
Published
2002-10
Volume
177
Issue
2
Pages
407-418
ISSN
0014-4886 (ISSN-L)
OpenAlex
W1985584861
Cited by
163
References
58
Citations by year
2026: 3 · 2025: 2 · 2024: 5 · 2023: 2 · 2022: 7 · 2021: 3 · 2020: 6 · 2019: 10 · 2018: 4 · 2017: 9 · 2016: 11 · 2015: 3 · 2014: 7 · 2013: 7 · 2012: 7
FWCI
2.90
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Heavy Metal Exposure and Toxicity
Keywords
zinc toxicity, poly(ADP-ribose) polymerase, poly(ADP-ribose) glycohydrolase, NADPH oxidase, neuronal nitric oxide synthase, neuronal cell death, DNA fragmentation, poly(ADP-ribosyl)ation, nitric oxide, cortical neurons, oxidative stress
MeSH terms
Poly(ADP-ribose) Polymerase Inhibitors, Adenosine Triphosphate, Animals, Astrocytes, Cells, Cultured, Cerebral Cortex, Enzyme Activation, Enzyme Induction, Enzyme Inhibitors, Glycoside Hydrolases, NAD, Neurons, Nitric Oxide, Poly(ADP-ribose) Polymerases, Tyrosine, Zinc, Apoptosis, Coculture Techniques, Nitric Oxide Synthase, NADPH Oxidases, Mice, Nitric Oxide Synthase Type II, Nitric Oxide Synthase Type I, Nitric Oxide Synthase Type III, DNA Fragmentation

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